Hone



N. KATZ Feb. 27, 1934.

HONE

Filed Deo. '7, 1952 qll "mn-II Patented Feb. 27, lg3d v Norman Kata, Tulsa, Olde.,

Application Becember 7, 1932. Serial No, 646,180

3 Claims.

The present invention relates to the general class or" honing devices and more particularly to a novel compact and convenient hone enclosed and protected by a casing embodying special fea- 5 tures to facilitate the honing of razor blades and the like.

In the usual devices of this character, there is provided an abrasive surface over which the blade to be sharpened is moved by reciprocating it parenel to the side of the hone. This type or device causes a bending back and forth of the minute teeth of the blade to thereby straighten the same.

Previous devices of this character have certain undesirable features which the improved hone of this invention obviates.

One undesirable feature of devices of this character is that very minute particles of the cutting edge are broken out and present a jagged sur face to the face of the shaver.

It is therefore a primary object of this invention to provide a hone that will impart to the blade a keen and perfectly smooth cutting edge.

Another object of this invention is to provide a honing surface which is concave and so posimoned with respect to the motion of the blade that the blade passes at an acute angle to the length of the said surface.

A further object of this invention is to provide the honing surface with a protective casing that will cause the blade to be reciprocated in a predetermined path with respect to the honing surface.

Another object of this invention is to provide a stop on the casing to be contacted by the ngers of the user in order to prevent damage to the blade by contact with the ends of the casing.

A still further object of the invention is to so construct the device that the honing motion will be at an acute angle to the direction of the grain,

10 of the honing surface, imparted to it during manufacture.

A further object of the invention is to provide a novel hone enclosed in a convenient casing embodying stops and guiding means all of which may be readily manufactured in quantities.

Other and more specific objects of the invention as well as the foregoing objects will be apparent as the detailed description and the appended claims are studied in conjunction with the accompanying drawing, wherein;

Figure 1 represents a plan view of one embodiment of the present invention.

Figure 2 is a sectional view taken on line II-II of Figure 1 looking in the direction of the arrows.

55. Figure 3 is a sectional View taken on line III-HI of Figure 1 looking in the direction of the indicating arrows.

Referring to the drawing in detail, a hone 10 is suitably positioned within casing 12. Hone 10 is made of steel, hardened and ground cn its working face in a manner to be disclosed. On Figure l, the arrow marked Grind indicates the direction of the grinding marks or grain on the honing face of hone 19 which is imparted thereto by abrading the surface. 05

'Hohes lo are so blanked out from a hardened and ground piece of sunicient length to provide any desired number of bones that the grinding marks on the surface are disposed at an acute angie to the direction of motion of a blade during 10 honing.

The arrow marked Grind on Figure 1 previously described is perpendicular to the ends of the device and the second arrow marked Hone represents the path of reciprocation of a blade 76 under treatments which is followed by reason of the inherent characteristics of the device which will be described in detail.

This angular movement of the blade causes, in addition to the direct bending back and forth of 80 the edge, a supplemental sidewise bending which will cause the blade to acquire a smooth and nished edge.

In order to insure that the reciprocation of the blade takes place in the manner above disclosed, B5 the casing is formed so that its sides parallel the sides of the honing surface. Due to the shape of the device, it will be natural for the user to reciprocate the blade in the direction which is most effective to impart a keen smooth edge.

The hone is assembled within the casing in any suitable manner and is of such size that it fits snugly within the case.

In the specic embodiment illustrated, case 12 is made in one piece of the shape clearly shown Oli.l in the drawing. After the blank is formed from which the casing is made, the lips 14 and 16 are crimped over, as seen in Figure 3. The lip 18 of one end section is bent inwardly thereby providing a casing which has three sides closed. Hone l0 is then slipped into the open end, as seen in dotted lines in Figure 2, and contacts the casing along both sides and ts within the angle formed between lip 18 and adjacent end 19 and the angle between lip 22 and end 20. Due to 105 the curvature of the honing surface, there is a third point of contact 24 with the bottom of case 12.

After the hone is assembled, the remaining end 20 of case 12 is closed by crimping lip 18 over the 110 exposed end of hone 10. The structure described provides a protective casing in which lips 18 and 22 act as stop members for contact With the rlngers of the user.

It Will be understood that these lips 18 and 22 act as stops to prevent the blade that is being sharpened from being damaged by coming in contact with ends 19 and 20, as Well as providing a rm grip on the hone 10.

Although, in its preferred form, the invention contemplates the provision of the lips 14 and 16 to guide the user of the hone in his manipulation of the blade over the honing surface, it Will be apparent that such lips may be dispensed with and the shape of the device alone will cause the honing to take place as desired. The inclination of the sides of the casing will serve as a visual guide.

It is Within the scope of this invention to provide a round bead on the inner edges of the lips 14 and 16 so that the same may guide the fingers of the user by contact in order to prevent any misuse of the hone.

From the foregoing description, it Will be apparent that the device may be made in rectangular form and the hone ground at an angle. This method of manufacture will also incorporate the desirable features as outlined in the description of the illustrated and preferred embodiment.

The method of using of the hone disclosed herein will be obvious from the foregoing detailed description. The hone may be grasped by one hand of the user Which it will t firmly and comfortably because of its convenient size and shape. The razor blade to be sharpened is pressed lightly with the tips of the fingers against the concave surface of hone 10 and moved to and fro with its cutting edge or edges held parallel to ends 19 and 20 of case 12. Proper movement of the blade in a direction at an angle to the grain of the honing surface is insured by the guiding effect of lips 14 and 16.

Damage to the cutting edge of the blade is prevented as lips 18 and 22 prevent contact with Walls 19 and 20.

The honing operation described is repeated with the' blade turned over.

Use of the hone of this invention as hereinbefore outlined will restore the cutting edge of the blade to its condition when new.

From a study of the preceding description it Will be seen that my invention overcomes certain undesirable features present in the hones now on the market. It Will also be seen that a relatively simple hone is provided that is free from the objections ensuing in the present complex hones. The device of the invention can be cheaply manufactured in quantities and is superior in its results to the usual hones.

The invention may be embodied in other specific forms Without departing from the spirit or essential characteristics thereof. The present embodiment is therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come Within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

What is claimed and desired to be secured by United States Letters Patent is:

l. A razor blade hone comprising a hard steel hone, the Working surface of which is prepared by grinding, a casing for said hone, means on said casing for guiding the blade at an acute angle to the grinding marks on the Working surface of said hone.

2. The combination defined in claim 1, wherein the guiding means comprises inwardly projecting lips formed on said casing.

3. A razor hone comprising a concave honing member provided with a ground Working surface, a casing enclosing said member, means on said casing for guiding the honing movement of a blade in a direction at an acute angle to the grinding marks on said Working surface and means to limit the extent of honing movement to prevent contact of the blade with the casing.

NORMAN KATZ. 

